gma500: Fix SDVO turning off randomly

Some Poulsbo cards seem to incorrectly report SDVO_CMD_STATUS_TARGET_NOT_SPECIFIED instead of SDVO_CMD_STATUS_PENDING, which causes the display to be turned off.

Signed-off-by: Guillaume Clement <gclement@baobob.org>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/gma500/psb_intel_sdvo.c b/drivers/gpu/drm/gma500/psb_intel_sdvo.c
index 19e36603b23b64e2c500cb425d3bf0246b2fdd8f..3bc8414533c9bfa235024bef3458bbcf3e119605 100644 (file)
--- a/drivers/gpu/drm/gma500/psb_intel_sdvo.c
+++ b/drivers/gpu/drm/gma500/psb_intel_sdvo.c
@@ -500,7 +500,8 @@ static bool psb_intel_sdvo_read_response(struct psb_intel_sdvo *psb_intel_sdvo,
                                  &status))
                goto log_fail;
 
-       while (status == SDVO_CMD_STATUS_PENDING && retry--) {
+       while ((status == SDVO_CMD_STATUS_PENDING ||
+               status == SDVO_CMD_STATUS_TARGET_NOT_SPECIFIED) && retry--) {
                udelay(15);
                if (!psb_intel_sdvo_read_byte(psb_intel_sdvo,
                                          SDVO_I2C_CMD_STATUS,